15mm x 1/2" Male Compression Parallel Elbow (Available in 8mm, 10mm, 12mm, 15mm, 22mm, 28mm, 35mm, 42mm, 54mm, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch, 1 1/4 inch, 1 1/2 inch and 2 inch BSP)

Flomasta Brass Compression Adapting 90° Female Elbow 15mm x 1/2" - Screwfix

NPH Compression Wall Plate Elbow, 15 mm X 1/2" - Brass